Phase behavior of carbon dioxide-aromatic hydrocarbon mixtures

Abstract

Abstract Occhiogrosso, R.N., Igel, J.T. and McHugh, M.A., 1986. Phase behavior of carbon dioxide-aromatic hydrocarbon mixtures. Fluid Phase Equilibria, 26: 165–179. Vapor-liquid-equilibria experiments are conducted at 299.25, 305.65, 316.25, 338.35, 363.15, and 383.15 K and for pressures up to 175 bar for the CO 2-isopropyl benzene (cumene) system. Pressure-composition information is obtained. The resulting experimental data are modeled using the Peng-Robinson equation-of-state. Two temperature-independent model parameters, δ ij , which accounts for molecular interactions between CO 2 and cumene, and η ij , which accounts for the size difference between CO 2 and cumene, are used to obtain good agreement between calculated and experimental data. The results for the CO 2-cumene system are compared to the CO 2-toluene and CO 2-m-xylene systems which are available in the literature. The CO 2-toluene and CO 2-m-xylene systems can be modeled using the same δ ij and η ij values used for the CO 2-cumene system.

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